Collector-ring.



N0. 809,220. PATENTED JAN: 2, 1906.

H. G. REIST.

GOLLEUTOR RING.

APPLICATION FILED APK.22,1904.

Fig. 2. Fig.3.

Inventor":

Henry G.Reist M y Liza";

UNITED STATES PATENT OFFICE.

HENRY Gr. REIST, OF SOHENEOTADY, NEIV YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF N EIV YORK.

COLLECTOR-RlNG.

Specification of Letters Patent.

Patented Jan. 2, 1906.

Application filed April 22, 1904. Serial No. 204.316.

To all whom, it may concern.-

Be it known that I, HENRY G. REIST, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Collector-Rings, of which the following is a specification.

Collector-rings on alternating-current machinery frequently become heated in operation and expand. In consequence of this expansion there is a tendency for the collectorrings to work loose from their supports, particularly when the machines are operated at high speeds.

The object of my present invention is the construction of a simple and eiflcient form of collector-ring and securing means therefor by which the collector-ring may be readily secured to its support in such manner that it will not work loose under the stress of operating conditions.

The various features of novelty which characterize my invention are pointed out with particularity in the claims annexed to and forming a part of this specification.

For a better understanding of my invention reference may be had to the accompanying drawings, in which I have illustrated one embodiment of it.

Of the drawings, Figure 1 is an elevation, partly in section, showing a portion of a collector-ring and support. Fig. 2 is a section on the line 2 2 of Fig. 1, taken on a somewhat larger scale; and Figs. 3 and 4 are similar views taken on the lines 3 3 and 4 1, respectively, of Fig. 1.

Referring to the drawings, 1 represents a cylindrical collector-ring support which may be secured to the shaft of ad ynamo-electric machine or the like in any suitable manner and usually carries two or more collector-rings 2. The collector-ring 2 is shown as divided at 2. The collector-ring illustrated is substantially T-shaped in cross-section, comprising a cylindrical portion 3 and a radial or web portion extending inwardly therefrom. Ordinarily the brush cooperating with the collector-ring presses against the exterior surface ofthe cylindrical portion 3 of the collector-ring. The abutting ends 5 and 6 of the divided collectorring have semicircularribs or flange portions 7 formed on each side of their radial portions. The ends 5 and 6 are clamped between plates or members 8, which have annular recesses 9 formed in their inner faces into which the ribs 7 enter and are locked. The members 8 are secured together by a threaded bolt 10. The collector-rings may be divided at one or more other points about its periphery, if desired. Circumferentially-extending slots 11, formed on the radial portion of the collectorring, separate comparatively flexible portions 12 from the main portion of the collector-ring. Midway between its ends each portion 12 is widened and has formed in it a threaded radially-extending aperture 13. Studs or projections 1 1 are secured to the collector-ring sections by threading them into the aperture 13. Each stud or projection 14 comprises a cylindrical main metallic pin or bolt 15. Each pin 15 is surrounded by an insulating sleeve or bushing 16, which is closed at its upper end. A metallic bushing or collar 17 binds the upper end of the bushing 16 to the portion 15. A metallic cap-piece 18 incloses the upper end of the bushing 17, with which it has a driving fit. The cappiece 18 is threaded externally to engage the threads of the aperture 13 and is formed at its lower end with a flange or shoulder 19, which abuts against the inner edge of the collector-ring portion 12. An enlarged collar 20, of insulating material, surrounds the lower end of the bushing 16. It will be observed that with this construction the pin 15 isvery rigidly secured in the socket 13, While at the same time the pin is insulated from the collector-ring proper. The lower ends of the pins 15 are preferably reduced at 21 to enter slots or grooves 22, formed for the purpose in the outer periphery of the member 1. One of the pins 15 for each collector-ring is preferably formed with a projection 23, which enters a positioning recess formed for the purpose in the bottom of the groove 22. The inner ends of the pins 15 after being secured in place in the collector-ring are turned to a diameter slightly smaller than that of the bottom of the groove 22.

In assembling the collector-ring the pro jection 23 is inserted in the recess formed to receive it and the abutting ends are pulled together. Owing to the relative dimensions Owing to'their flexibility, the de flection of the parts 12 may occur without distortion of the cylindrical portion 3 of the collector-ring. hen, in operation, the col lector-ring becomes heated and expands somewhat, this tension will be decreased; but the parts are so proportioned that with any ordinary expansion the parts 12 will still be under tension, in consequence of which the collector-rings cannot work loose.

In the ordinary working condition of the apparatus the parts 12 occupy a position between the dotted-line initial position and the position shown in full lines, which corresponds to the condition of the apparatus in which the expansion of the collector-ring is so great that the parts 12 are not distorted, but are in their unstrained condition.

While I have described my invention as embodied in a collector-ring, it will be readily understood that it is capable of wider application. Moreover, the form of my invention may be modified without departing from its spirit.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. A collector-ring cut away to form a flexible part, and a supporting-stud carried by said part.

2. A collector-ring having circumferentially-extend ing slots formed in it to give flexible portions, and supporting-studs engaging said portions.

3. In combination, a cylindrical support, a collector-ring, flexible portions carried thereby, and means extending between said flexible portions and said support and normally holding said portions under tension.

4:. In combination, a support, a collectorring, flexible members secured thereto, and means extending between said support and said flexible members holding said flexible members under tension when the collectorring is cold.

5. In combination, a support, a collectorring formed with flexible parts, and means for securing the collector-ring to the support in such a manner that the flexible parts are put in an initial tension which decreases when the collector-ring expands.

6. In combination, a support, a collectorring formed with flexible parts, and a device extending between said support and said flexible parts by which the latter are put under initial tension.

7. In combination, an annular collector-ring formed with slots in it to give flexible strips or portions, each of which is connected at its ends to the collector-ring proper and is formed with a socket located between its ends, pins or studs secured in said sockets and extending radially inward from the collector-ring, and a cylindrical support for the collector-ring having an engaging surface orsu rfaees against which the inner ends of the studs or pins bear, the parts being so proportioned and arranged that when the collector-ring is at normal atmospheric temperature the flexible portions are deflectedoutward.

8. An annular collector-ring having circumferentially-extending slots formed therein to give flexible portions, and supporting means engaging said flexible portions.

9. A collector-ring formed with one or more flexible strips or portions each secured at its ends to the collector-ring proper, and a supporting device engaging each of said strips between its ends.

10. A collector-ring formed with one or more flexible strips or portions each secured at its ends to the collector-ring proper and having a socket formed in it, and a supporting pin or stud located in said socket.

11. In combination, a cylindrical support, a collector-ring formed with flexible strips, each of said strips being secured at its ends to the collector-ring proper, and a device for securing the collector-ring to the support extending between said support and each flexible strip.

12. In combination, a cylindrical support, a collector-ring formed with flexible strips, each of said strips being seeu red at its ends to the collector-ring proper, and means for securing the collector-ring to said support extending between said support and the flexible strips, said means being arranged to deflect the strips outward in the normal condition of the apparatus.

In witness whereof I have hereunto set my hand this 20th day of April, 1904:.

HENRY G. REIS'I.

Witnesses:

BENJAMIN B. HULL, HELEN ORFoRD. 

